//*** Rendering forms for fraction problems ***
oa.rf.fractionEquation = new RenderingForm(
    "fractionEquation",
    "Enter a value for the result (or an asked for operand) of an arithmetic fraction equation.",
    RenderingModeEL.individually
    );
/**
 * Decides, if a given arithmetic problem type is applicable to a fractionEquation rendering form.
 * 
 * @author Linda Eckardt
 * @param {ArithmeticProblemType} ap Type of an arithmetic problem.
 * @return {Boolean} True if given type is applicable, else false.
 */
oa.rf.fractionEquation.isApplicableTo = function (apt) {
  return (
    apt instanceof ArithmeticProblemType && 
      (apt.numberType === NumberTypeEL.Fraction)
          );
};